One really important reason to be unhappy that this man's book is taken to be nonfiction is that he claims to have beaten several different addictions with essentially willpower alone.
I am a long way from AA's biggest fan. But it really does seem to work for some people and claiming that the disease model of addiction is "garbage" as Frey calls it, is not a good thing coming from a man who has not fought addiction to really nasty drugs like he says he has.
(e.g. If I were to write my bestselling book "How I beat breast cancer with a vegan diet" wherein I said chemotherapy was garbage and giving up animal products got rid of cancer just fine, when none of that was true, then what I would be doing would be somewhere between irresponsible and homicidal. What it wouldn't be is excuseable.)